Aball is thrown upwards and returns to the same position, with negligible air resistance acting on it. compared with its original speed after release, its speed when it returns to the same position is about
a. half as much
b. the same
c. twice as much
d. four times as much

"Compared with its original speed after release, its speed when it returns to the same position is about b. the same as, since gravity has now acted up on. 

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Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.